Answer;
C) parathyroid glands; parathyroid hormone
Explanation;
-Parathyroid glands (humans, four) are imbedded in the thyroid gland and they secrete the parathyroid hormone (PTH). So-called C cells dispersed throughout the thyroid gland, the parathyroids and thymus secrete another hormone, calcitonin. Both hormones play a significant role in the maintenance of calcium homeostasis.
-PTH, a polypeptide secreted in response to hypocalcemia raises the concentration of plasma calcium by; increasing renal calcium reabsorption, mobilizing calcium from bones by stimulating osteoclastic activity, in the presence of adequate amounts of vitamin D, stimulating the absorption of calcium from the small intestine; and lowering levels of plasma inorganic phosphate by inhibiting renal reabsorption of phosphate
Organs are made up of cells, and organ systems are made up of organs.
Answer:
The maturing of the corpus callosum by middle childhood is especially important for <em>motor coordination</em>.
Explanation:
The corpus callosum is the part of the brain which is effectively involved in signal transmission. The signal transmission across the right as well the left hemisphere is the main function of the corpus callosum. The transmission of effective and correct signals comes under the control of motor coordination. Hence, the maturing of the corpus callosum is especially important so that effective transmission of signals through motor coordination can happen.
Once upon a time, there was a cell. It was moving around the primordial soup trying to make it in that harsh world. All of a sudden, it encountered a small prokaryotic cell. To be honest, the cell was feeling a little lonely and it was happy to come across somebody to share the habitat with. The two cells started spending a lot of time together, just quietly coexisting. The first cell started thinking how it would be so much easier to survive if the other, small cell were to live with me. I could provide safety and shelter, and the small cell can pay me back by providing me with the energy I need for my daily metabolic processes. The cell was hesitant for a second, but then bravely said ''Hey, what do you think about symbiosis?''. And the rest is (endosymbiotic) history.
Answer:
<em>Mustn't.</em>
Explanation:
Children in this picture are been labelled pedestrians, and it is totally wrong to use the zebra/white road crossing. This is because their are signs for pedestrians which is pedestrian crossing which is suggestive on when to move or halt totally.
In the other words, the red light means to halt totally while the amber means ready while the green signals move; but these all applies to auto operators or bike and motorcyclists. So the children mustn't cross until the pedestrian walk is signalled for movement on it.